400144049 has 2 divisors, whose sum is σ = 400144050. Its totient is φ = 400144048.

The previous prime is 400143929. The next prime is 400144061. The reversal of 400144049 is 940441004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 309513649 + 90630400 = 17593^2 + 9520^2 .

It is a cyclic number.

It is not a de Polignac number, because 400144049 - 2¹⁶ = 400078513 is a prime.

It is a super-2 number, since 2×400144049² = 320230519900228802, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (400144099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200072024 + 200072025.

It is an arithmetic number, because the mean of its divisors is an integer number (200072025).

Almost surely, 2^400144049 is an apocalyptic number.

It is an amenable number.

400144049 is a deficient number, since it is larger than the sum of its proper divisors (1).

400144049 is an equidigital number, since it uses as much as digits as its factorization.

400144049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 400144049 is about 20003.6009008378. The cubic root of 400144049 is about 736.8947359552.

The spelling of 400144049 in words is "four hundred million, one hundred forty-four thousand, forty-nine".